Tape dispensing apparatus



A May 26, 1970 ABBOTT ETAL 3,513,809

TAPE DISPENSING APPARATUS Filed March 51, 1967 3 Sheets-Sheet l CJABBOTT ME ABBOTT INVENTORS ATTORNEY May 26, 1970 M. F. ABBOTT E 3,513,809

' TAPE DISPENSING APPARATUS Filed March 31, 1967 v 3 Sheets-Sheet 3 FIG 9 I E I 4| I80 F /G.

CJABBOTT Mf-T ABBOTT INVENTOR.

ATTORNEY United States Patent Office 3,513,809 Patented May 26, 1970 3,513,809 TAPE DISPENSING APPARATUS Medford Floyd Abbott and Clifford June Abbott, Canyon, Tex., assignors, by mesne assignments, to Taper Tools, Inc., Amarillo, Tex., a corporation of Texas Filed Mar. 31, 1967, Ser. No. 627,426 Int. Cl. Bc 3/18 US. Cl. 118-415 4 Claims ABSTRACT OF THE DISCLOSURE Apparatus for applying adhesive fluid onto a tape and dispensing and applying such tape in drywall construction. The steps of the process provided comprise the steps of passing the upper surface of a strip of tape into contact with the bottom surface of a body of adhesive fluid through a first orifice, holding an upwardly directed surface of said tape against the bottom of said orifice to render it substantially fluid tight, applying said adhesive to the upwardly directed surface of said tape, passing tape and adhesive adherent thereto through a second orifice rectangular in vertical crosssection out of said body of adhesive fluid, passing the upper surface of said tape and adhesive adherent thereto below a cylinder with a horizontal longitudinal axis, said cylinder being rotatable about said axis, to apply said adhesive to said tape, while adjusting the height of said cylinder relative to said second orifice and keeping constant the amount of fluid between said second orifice and said cylinder, passing said tape upward from said cylinder past and in contact with guide elements thereabove, draining oif excess adhesive fluid from said tape back to said cylinder, and applying said adhesive coated tape to the ceiling. This is especially convenient when the process is performed by an operator on stilts.

One object of this invention is to provide an improved apparatus for dispensing builders tape.

Yet another object of this invention is to provide a portable dispenser for builders tape adaptable to twohanded tape manipulation which dispenser is sturdy in construction and reliable and convenient in operation.

Other objects and advantages of this invention will be apparent to those skilled in the art in view of the disclosure of the below specification, of which specification the drawings attached hereto form a part and wherein:

FIG. -1 is an overall view of a preferred embodiment of the invention from above and to one side of an upper rear corner thereof, with the applicator cylinder chamber doors closed;

FIG. 2 is an enlarged view of the applicator cylinder chamber with a door thereof open;

FIG. 3 is a vertical longitudinal sectional view along plane 3A-3B of FIG. 4;

FIG. 4 is a top view, in the direction 4A, of the device of the invention;

FIG. 5 is a horizontal sectional view along plane 5A-5B of FIG. 3;

FIG. 6 is a bottom view, in perspective, of the device of the invention, with the doors to the applicator cylinder open;

FIG. 7 is a vertical sectional view along plane 7A-7B of FIG. 5; FIG. 8 is an overall view showing the use of the device of this invention;

FIG. 9 is a side View of another embodiment of the apparatus of this invention; the view is partly broken away to the vertical longitudinal plane section shown as 9A9A of FIG. 10. FIG. 10 is a top view along the direction of the arrow 10-A of FIG. 9. FIG. 11 is an exploded side view of the inner side of the apparatus shown in FIG. 9, and at a reduced scale in size.

FIG. 12 shows in somewhat enlarged scale or size the interior of the guide roller assembly shown in FIG. 10 as seen along the direction of the arrow 12A of FIG. 11.

The device of this invention, generally shown as 11 in FIGS. 18 is broadly intended for use by an operator, as 12, walking about floor 13 on stilts 14 and 15, as shown in FIG. 8, applying a glued tape, as 16, to the ceiling 17. The stilts are sturdily and firmly strapped to the legs of the operator, as by releasable straps as 18 and 19; such stilts are each provided with strong, broad feet as shown at 20 and 21 to avoid straining or disturbing the balance of the operator. The device of this invention contains a viscous fluid adhesive 22 which is dispensed and applied to the tape 16 as below described. Such adhesive material adheres to the tape and adapts it to be applied directely to construction materials as wall board, as for purpose of masking joints thereof in ceilings. Such adhesive may be cementitious. The device of this invention is attached to and supported by a wide belt or strap, as 23, which is supported on the shoulder 24 or waist of the operator. The device is thereby readily portable and positioned as desired on the hip of the operator. The device of this invention provides for convenience and speed in applying such tape to. the ceiling. The device works very smoothly; it is arranged to take advantage of that the tape r16 uses the dispensed adhesive fluid 22 as a lubricant for the passage of the tape through the passageways in the container as below described.

In the preferred embodiment shown in FIGS. 1-8 the device 11 generally comprises a container 25 land a strap 23. The container comprises a first compartment 31 for releasably holding a roll of tape, a second compartment 32 for containing and dispensing adhesive fluid to be added to one side of the tape, and a third control compartment 33 for controlling the application and. thickness of the adhesive fluid on the tape and facilitating the dispensing of the thus-coated tape.

The container 25 comprises a rear wall 35, a front wall 36, an outer side wall 37, an inner side wall 38 and a bottom or floor 39, all imperforate.

The front wall 36 and a portion of side walls 37 and 38 and partition 46, below described, define the boundaries of the first or dispensing chamber 31. A support bracket 42 made of thick aluminum sheet is firmly attached to the inner side of wall 38. The inner side of wall 37 is similarly provided with a support bracket 43. Each bracket bears a 3" deep upwardly open A" wide slot, 42A and 43A respectively. The slots firmly support and position the /1" OD. axle 44 of the roll of tape 45 and prevent harmful shaking thereof during operation. This provides for firmly supporting the roll 45 so that it does not so shake as to affect the position of the container and the balance of the operator during use of the device yet permits ready replacement of the roll of tape, as when one roll is exhausted and another roll of tape is needed. A roller 28 at the end of arm 29, which arm is pivotally supported on partition 46 and is downwardly urged by spring 30, stabilizes the tension required to unroll the roll 45.

The second, or fluid storage compartment, 32, comprises and is bounded laterally by a portion of walls 3-7 and 38, by partition 46 as a front wall, by wall 55 as a rear wall and, on the bottom, by a portion of the slotted container bottom 39. Partition 46 extends from wall 37 and 38 and is attached thereto by watertight seams: partition 46 comprises a vertical portion 47 and a sloped portion 52. Portion 47 is an imperforate sheet which extends from wall 37 to wall 38 and is attached thereto from a straight line joining points as 50 and 50 between walls 36 and 55, on the top edge as 51, 51' of compartment walls 37 and 38 respectively, downward a few inches to a point 48 therebelow. The partition then extends by an imperforate sloped portion 52, continuous with portion 47 and extending between walls 37 and 38 and attached thereto, to the top of a slot 53 in the floor of the compartment. The slope of the floor 52 is sufficiently steep to avoid any accumulation of solid thereon by sedimentation as would result in a change of density of the fluid 22 during the period that the operator uses the apparatus.

The bottom edge of portion 52 is straight and it is attached laterally by watertight seams to shoulders 58 and 58' of floor 39. The bottom edge of partition portion 52 forms the top of an orifice 94 which has, in vertical section, a rectangular cross-section of the same size and shape as orifice 95 in the preferred embodiment.

Partition wall 55 is an imperforate steeply sloped, relatively vertical sheet made of the same material as walls 35-38. It extends side-to-side from wall 37 to wall 38, it extends vertically from the top edges 51 and 51' of each wall 37 and 38 and a straight line therebetween located 1%" from wall 35 to 2" from wall 35 at the level of the shoulders 58, 58' of the bottom plate 39. It is joined along its entire length to walls 37 and 38 and -to shoulders 58 and 58 by watertight seams; the bottom edge 77 of plate 55 extends in a straight line between such shoulders and forms the top of orifice 95 which has, in vertical section, a rectangular cross-section as shown in FIG. 7.

The entire device 11 is supported by a 2 /2" wide A2" thick canvas belt 23. Belt 23 is attached to the outside of wall 38 with the upper edge of said belt at upper edge of wall 38. It is firmly attached 6" from wall 36 and 4" from wall 35 at its upper and lower edges. Container 25 has, in the preferred embodiment, an overall length of 18 inches along walls 37 and 38, an overall Width of 3%" along walls and 36, and an overall height of 7" along walls 35 and 36. As measured along top edge 51, first compartment 31 is 7% long from wall 36 to the top of partition 46, second compartment 32 is 9 /2" long from partition 46 to wall 55, and compartment 33 is 1%" long. Walls 35-38 each have a right rectangular outline.

The first or dispensing compartment 31 is provided with A" wide 3" deep slots in supports 42 and 43 for support of the A" axle of the 2" wide tape roll 45 which roll is 6" in diameter. The second or fluid storage compartnient 32 which carries fluid adhesive 22 is provided with a sloped bottom plate 52 starting at point 48 3 /2" below the top edge 51 of wall 37 (and 51 of wall 38) and extends downward 6 /2 below edge 51 to 5" from wall 35 at top of shoulders 58 and 58'. Such partition is made of thick aluminum. A flat plate continuous with plate 52 extends on top of shoulders 58 and 58' 2" from rear edge of plate 52 to leave a 1" long gap 41 between shoulder 58 and 58' and plate 55 and the rear edge of plate 40. Slot 53 is open to chamber 32 through that gap.

A longitudinal channel, 53, of right rectangular vertical cross-section is formed in the center of the top of the /2" thick floor member 39. The channel floor, 78, is A" below the shoulders 58, 58' and is 2%" wide for the 2" wide tape 16. The side walls 54, 54' of the slot 53 are vertical. The shoulders 58, 58 extend laterally of the side walls of the slot 53 to walls 37 and 38. A /2" diameter rotatable roller pin 57 is rotatably attached to walls 37 and 38 below wall 52 6" distant from wall 35, with the bottom edge of said roller A" above shoulders 58 and 58'.

In operation, the tape 16 travels from reel (with tension adjusted by roller 28) around pin 57 through slot 53 in sliding contact with the flat bottom of plate 40, under the straight bottom edges of walls 52 and 55 and around rotatable applicator cylinder 59. Cylinder 59 is mounted to be adjustable as to height: the fluid 22 in chamber 32 passes through gap 41 to contact and adhere to the top surface 89 of the tape 16, which tape is slidably supported in the channel 53.

Applicator cylinder 59 comprises a central firm Wooden cylindrical base 66 which, in the preferred embodiment is 2" long and 1" in diameter, and located directly above slot 53 between walls 35 and 55. Base 66 has its central longitudinal axis horizontal, parallel to and spaced away from wall 55, wall 35, and floor 78 of sot 53. A metal axle shaft 67 passes through said axis of base 66. Base 66 is covered with a replaceable A" thick 1 /2 O.D. 2 long 1" LD. sleeve of hydrophobic resilient piled fabric, 69 (as nylon 66) such as is used for paint rollers. The sleeve is tightly fitted on base 66. The pile on the fabric spreads out but does not absorb the adhesive fluid 22. The sleeve fits into slot 53.

The axle of applicator cylinder 59 is rotatably supported at its ends by plates 60A and 60B, which plates are adjustably located in mounting brackets 61 and 62. Each bracket is firmly attached laterally of slot 53 to plate 39 and is provided with a plurality of vertical slots as 63, 64, and 65. The axis of the wheel 59 is located at the height desired by tightening plate 60A to bracket 61 and plate 603 to bracket 62 in vertical position as desired. Tightening is accomplished by screws as 68A and 68B. Sleeve 69 of cylinder 59 thus may be lowered into slot 53.

The doors 71 and 72, each 2- /2" wide and 3" high, are hingedly attached to walls 38 and 37 respectively and closely fit openings 73 and 74 respectively, which openings are each 2" wide and 2" high, and which openings fully expose the mounting brackets 61 and 62 and so permit adjustment of the cylinder 59 on its mounting brackets 61 and 62. The doors are each provided with ledges, 71A and 72A, which snap over wall 35 to resiliently hold the doors 71 and 72 against walls 38 and 37 respectively in closed operative position. Any such adhesive fluid 22 for the tape 16 as passes through the space between such doors and walls dries and forms fluidtight, yet readily broken, seals.

This structure provides that the distance between the upper surface, 89, of the tape 16 and the bottom edge 77 of wall 55, which edge forms the top of the rectangular orifice 95, may be readily and closely adjusted by opening the door as 71 and 72 and raising or lowering the axle of the cylinder 59 and so control the thickness of the layer of adhesive fluid drawn through the orifice 95.

A 3" long vertical U-shaped channel of right rectangular horizontal cross-section made of A sheet having an inner width of 2%" and arms 80A and 80B each 1%" long, is fixedly attached to wall 35 at the upper end of chamber 33 and reaches to edges 51 and 51 of walls 37 and 38 respectively. At the upper end of channel 80 is a series of rotatable thick, annularly grooved 1'' OD. diameter wheels 81, 82, and' 83 each spaced apart center-to-center distance from each other on a shaft 84 which shaft is rotatably yet firmly mounted on channel 80. The top of wheels 81, 82 and 83 are at the level of edges 51 and 51. Channel 80 is made of A sheet aluminum.

The channel 80 prevents lateral motion, and consequent twisting of the tape 16 during application thereof to ceiling 17 or other work.

The annular grooves on each wheel are V-shaped, A3" deep, and open in the direction of the radius of the wheel. This provides a very limited contact area of such wheels and the surface 89 of tape 16; the thickness of the contact area is about total for each wheel. A W space is provided between wheels 81, 82, 83, and wall 35 and a A space between said wheels and wall 55. Tape 16 passes between wall 35 and wheels 81, 82, and 83. The annularly grooved wheels do not substantially disturb the layer of adhesive on the tape but do serve to hold such tape in sliding contact with the flat inner surface of channel 80 and between its arms 80 and 80A and so prevent lateral motion and twisting of the tape although suflicient tension is applied to such tape to evenly distribute a layer of adhesive thereover by cylinder 59.

The operator 12, as shown in FIG. 8, may use both his hands with the device of this invention. He applies the tape 16 to the ceiling 17, as in masking joints located in such ceiling, with an applicator, such as a standard 3" wide putty knife, 86, with one hand, 87, while drawing the tape from out of the container with his other hand, 88, and steadily walking forward, utilizing the relation of the face 89 of the tape (which face received adhesive fluid 22) relative to the operators motion provided by the device 11.

The operator controls the position of the container 25 relative to his body by placing the supporting strap or belt 23 about his body in a convenient position to his arms; the orientation of the tape leaving the container 25 relative to the operators hands is readily adjusted and maintained in such adjusted position thereby.

When a rooms length of ceiling has been covered, the operator may tear the tape 16 over the top edge 91 of wall 35, which edge may be serrated, and folds the remaining piece of tape 92 down as shown in FIG. 3 in dotted lines along the wall 35.

The volume of the fluid storage chamber 32 is such as to provide sufficient volume of adhesive to satisfy the demand therefor of the tape 16. The tape -16 is, in the preferred embodiment, a standard 250-foot long 2" wide roll of builders tape such as known as perfatape. At the open slot 53 whereat the tape 16 passes below sloped wall 52 and wall 40 the tape is drawn against the bottom sloped portion 52 and bottom of the flat portion 40 due to the tension in tape 16 when such is drawn past cylinder 59 from roller 57. This renders the orifice 94 substantially fluid-tight. The fluid 22 of chamber 32 contacts surface 89 through gap 41, adheres to such surface, and is carried along by said surface as an adherent layer through orifice 95. Such adhesive fluid is then distributed over the tape by the surface layer 69 of the cylinder 59. Thereby, notwithstanding that there is an opening, as 94, at the bottom of the fluid containing chamber 32 and such opening could be about A;" high and 2." wide over the tape, there is no leakage past such hole because the orifice 94 is sealed by the pressure of the tape against the top of the orifice and the tape is moved through the orifice at a rate which is no less than the rate of leakage past such orifice in its static condition.

The ready vertical adjustment of cylinder 59 and its readily replaceable sleeve 69 provide that the fluid 22 from container 32 is evenly applied across face 89 of tape 16 in a readily controllable amount. The operator may readily adjust the height of the bottom of sleeve 69 to the level of the bottom or to the level of the top of orifice slot 95 or anywhere inbetween. The tape 16 is, in operation, due to the location of pin 57 drawn against the top of slot 94. Although the speed of application of tape 16 to ceiling 17 may rise, tension across tape 16 between the bottom of sleeve 69 and bottom of slot 94 is stabilized 'by roller 28 and the distance between bottom of slot 95 and top surface 89 of tape 16 stays steady. The operator readily adjusts this distance for optimum thickness of adhesive on the tape at his usual operating-- as on stiltsforward walking speed. Cylinder 59 thus controls and stabilizes the thickness of the adhesive.

The device and procedures of this invention provide economy of distribution of the adhesive from the container to the tape and from the coated tape to the ceiling to which such tape is applied as well as convenience. As shown in FIG. 3, the tape 16 moves upwardly from the wheel 59; excess adhesive applied to such rtape flows downward from such tape and is caught on cylinder 59, which rotates counter-clockwise as shown in FIGS. 2 and 3, and is returned to a reservoir 101 between orifice 95 and cylinder 59 above tape 16 from which it is threafter applied to the tape by such rotating cylinder in its continued counter-clockwise rotation (as shown by arrow 103 in FIG. 2). Accordingly, the structure of chamber 33 provides for a clean as well as an economical procedure for applying adhesive to the tape and applying the adhesive coated tape to the ceiling because any excess or loosely adherent adhesive tending to drop from the tape after initial application thereto is not spattered on the floor and thus wasted (and requires time for subsequent clean-up) but also, the motion of the applicator cylinder 59 carries such dropped excess adhesive in a counter-clockwise direction from the point 102 where the tape leaves contact with the wheel, to the reservoir 101 and such accumulation limits the escape of the fluid adhesive from the chamber 32 through the orifice 95. Accordingly, when an excess of adhesive is applied to the tape, such excess is returned by the device of the invention herein, in such a manner and to such a position as to be subsequently fed to the tape. Thus, this device particularly provides for an even and economical distribution of the adhesive to the tape. The operator, on noticing any excess of fluid adhesive carried by the tape to the work, opens doors 71 and 72 and on noting any increase in amount of fluid at zone 101 raises the level of cylinder 59 relative to orifice 95. If too little adhesive fluid is being carried, cylinder 59 is lowered to provide for a greater amount of adhesive to be carried by the tape 16, upwards of 59.

A wire screen, as 98, is attached to walls 37 and 38 in the middle of chamber 32 to lessen the tendency of the fluid to spill; a similar screen 99 may be placed at the top of chamber 32 to permit inspection through the orifices of such screen while lessening the tendency of the liquid to spill. The same type screen may be provided immediately over the slot 53. Such screens may each be made of vertical 20 gauge sheet strips, each A2" wide and with a /2" square space between the strips forming the grid: Such a high series of walls forming such grid serves to limit the movement of the fluid in the container without appreciably limiting its downward flow. Such screens are removable for cleaning.

The device 11 may be made out of plastic or made from metal by conventional machine methods. A noncorrosive material, such as stainless steel, aluminum, or plastic, may be used. The preferred model is made of aluminum which is readily machined, non-corrosive, sturdy and relatively inexpensive.

With the device and procedure of this invention above described twenty to twenty-five 25 0-foo t'rolls of builders tape are applied in an 8-hour day by one operator whereas by conventional methods only eight such rolls are usually applied by one operator in an 8-hour day. This machine, in the preferred embodiment above described, besides saving time, permits that one operator hangs five rolls of tape with the same amount of adhesive material as is otherwise required by the usual procedures in applying only two such rolls of tape.

The embodiment 111 shown in FIGS. 9-12 includes a removable roller assembly, 134. Assembly 134 comprises a channel wall assembly 135 and supported therein, an applicator cylinder 159 and a control wheel group 180. The assembly 134 comprises a vertical Wall 135 and side wall portions 135 and 136 firmly aflixed to the sides thereof. Cylinder 159 is the same in structure as applicator cylinder above described and is located with its axis at the same distance from the floor of the apparatus 111 as the axis of cylinder 59 from floor of apparatus 11. Wheel group 180 is the same in size and shape and location relative to wall 135 as wheels 82, 83 and 84 are relative to wall 35 in embodiment 11. Assembly 134 is substituted for the upper portion of end wall 35 of embodiment 11 and the portions of wall 37 and 38 adjacent thereto, including doors 71 and 72. The entire assembly 134 is positioned by vertical adjustment screws 140 and 141 in bay 145 of container 111 and is releasably held in place by locking screw 142. Bay 145 is a continuation of walls 37 and 38 of the structure as shown for embodiment 11. forward to a rear wall 3 5'.

Although, in accordance with the provision of the patent statutes, a particular preferred embodiment of this invention has been described in detail and the principles of the invention have been described in the best mode in which it is now contemplated applying such principles, it will be understood that the constructions shown and described are merely illustrative and that the invention is not limited thereto and, accordingly, alterations and modifications which readily suggest themselves to persons skilled in the art without departing from the true spirit of the disclosure hereinabove are intended to be included in the scope of the annexed claims.

We claim: 1. Dispensing apparatus comprising a container with three chambers in series:

a roll of tape located in the first chamber, said roll having a horizontal axis and being rotatable there about and all said chambers have a width at least as great as the tape, means in said first chamber and attached to said chamber for firmly yet releasably supporting said roll for rotation about said axis, the second chamber being fluid tight except for a tape inlet and a tape outlet at the bottom thereof, said bottom orifice being open to an upwardly open groove, said tape slidably fitting into said groove, the bottom of said orifice being formed by the bottom of the upwardly open groove and located between said second and third chamber, said orifice having a width at least the width of the said tape, said third chamber comprising a fluid tight chamber open at its top, the bottom wall and its upwardly open groove of the second chamber extending into and forming the bottom wall of said third chamber, said second and said third chamber being connected through said groove, spaced apart elements rotatably yet firmly attached to the top of said third chamber and extending thereacross for substantially the width of said tape, means fixedly attached on top of said third chamber slidably holding said tape and preventing shifting of said tape relative to said rotating elements, a right circular cylinder having its length fitting into the groove width with its axis horizontal, mountings rotatably supporting said cylinder and fixedly attached to said third chamber, and means supporting said cylinder adjustably on said mounting with its lowermost external surface at a level between the top and the bottom of said second orifice. 2. Apparatus as in claim 1 wherein the top of said third chamber is at a level at least as high as the top of the second chamber.

3. A dispensing apparatus as in claim 1 comprising a container with three chambers in series:

said roll of tape comprising a roll of builders tape located in the first chamber, said roll having a horizontal axis and being rotatable thereabout, all said chambers having a width greater than that of said tape, means in said first chamber and attached to said chamber for firmly yet releasably supporting said roll for rotation about said axis, means in said first chamber for controlling the tension of said tape, the second chamber being fluid tight except for a set of tape inlet and tape outlet orifices at the bottom thereof, said chamber comprising side and front and rear walls, and a bottom, said bottom provided with an upwardly open slot, said tape slidably fitting into said slot, one tape inlet orifice connecting said first and second chamber, the other tape outlet of said set of orifices connecting said second and third chambers, the bottom of said first, tape inlet, orifice being formed by the bottom of the upwardly open slot and located between the first and second chambers, means in said first chamber holding a portion of the top surface of said tape at a level above the level of the top of said first orifice, the bottom of said second, tape outlet orifice being formed by the bottom of the upwardly open slot and located between said second and third chamber, both said orifices having a width slightly larger than the width of said tape,

said third chamber comprising a bottom, side walls, floor, rear wall and front wall and forming a fluid tight chamber open at its top, the bottom wall and its upwardly open slot of the second chamber extending into and forming the bottom wall of said third chamber, said second and said third chamber being connected through said slot, the top of said third chamber being at a level as high as the top of the second chamber, a right circular cylinder having a length fitting into the slot width with its central longitudinal axis horizontal and its outer surfaces spaced away from the walls of said third chamber, mountings for rotatably supporting said cylinder at each side fixedly attached to said floor of said third chamber, means supporting said cylinder adjustably on said mountings with its lowermost external surface at a level between the top and the bottom of said second orifice, openings in the side walls of said third chamber for exposing the cylinder mounting and fluid tight closure members therefor attached to said walls.

4. Apparatus as in claim 3 wherein said tape has an upper and lower face and extends from said first chamber through said first orifice, to the second chamber, a fluid adhesive to said upper face is contained in the second chamber, said tape lies with the lower face thereof flat in the bottom of said slot at the bottom of said second and third chambers, and passes through said second orifice into said third chamber, said tape passes between said cylinder and said bottom of said slot, said cylinder surface is resilient and non-absorbent to said fluid, said tape passes around an in contact with said cylinder and then passes upwards between said spaced apart circular elements with said previous lower face against the rear wall of said third chamber and the previous upper face thereof contacting said circular elements, and said apparatus comprises a belt which is attached to the upper edge of a container side and supports said apparatus.

References Cited UNITED STATES PATENTS 2,679,232 5/1954 Brown 118-415 X 2,717,575 9/1955 Merrifield 118-415 X 2,779,307 1/1957 Foresta et al. 1l84l3 WALTER A. SCHEEL, Primary Examiner J. P. MCINTOSH, Assistant Examiner 

